<link rel="stylesheet" href="/static/admin/js/webuploader/webuploader.css" type="text/css">
<style>
.filelist{
    display: flex;
    flex-wrap: wrap;
}
.filelist li{
    margin-right: 30px;
    margin-bottom: 30px;
    position: relative;

}
#uploader .filelist div.file-panel {
    background: rgba(0, 0, 0, 0.25) none repeat scroll 0 0;
    height: 0;
    left: 0;
    overflow: hidden;
    position: absolute;
    bottom: 0;
    width: 100%;
    z-index: 300;
    text-align: center;
}
.webuploader-pick{
    border: 1px solid #007bff;
    color: #007bff;
    background-color: transparent;
}
p.imgWrap{
    border-left: 0;
    height: auto;
}
#uploader .file-panel .cancel{
    color: #fff;
}
</style>
<input type="hidden" name="{{name}}" class="form-control"  id="{{name}}" />
<div id="uploader" class="wu-example">
    <div class="queueList">
        <div id="dndArea" class="placeholder">
            <div id="filePicker"></div>
        </div>
    </div>
    <!-- <div class="statusBar" style="display:none;">
        <div class="progress">
            <span class="text">0%</span>
            <span class="percentage"></span>
        </div><div class="info"></div>
        <div class="btns">
            <div id="filePicker2"></div><button type="button" class="btn btn-primary btn-sm uploadBtn">开始上传</button>
        </div>
    </div> -->
</div>
<script src="/static/admin/js/webuploader/webuploader.js" type="text/javascript"></script>
<script>
    jQuery(function () {
        var pics_ids = "{{name}}";
        var $ = jQuery,    // just in case. Make sure it's not an other libaray.

            $wrap = $('#uploader'),

            // 图片容器
            $queue = $('<ul class="filelist"></ul>')
                .appendTo($wrap.find('.queueList')),

            // 状态栏，包括进度和控制按钮
            $statusBar = $wrap.find('.statusBar'),

            // 文件总体选择信息。
            $info = $statusBar.find('.info'),

            // 上传按钮
            $upload = $wrap.find('.uploadBtn'),

            // 没选择文件之前的内容。
            $placeHolder = $wrap.find('.placeholder'),

            // 总体进度条
            $progress = $statusBar.find('.progress').hide(),

            // 添加的文件数量
            fileCount = 0,

            // 添加的文件总大小
            fileSize = 0,

            // 优化retina, 在retina下这个值是2
            ratio = window.devicePixelRatio || 1,

            // 缩略图大小
            thumbnailWidth = 110 * ratio,
            thumbnailHeight = 110 * ratio,

            // 可能有pedding, ready, uploading, confirm, done.
            state = 'pedding',

            // 所有文件的进度信息，key为file id
            percentages = {},

            supportTransition = (function () {
                var s = document.createElement('p').style,
                    r = 'transition' in s ||
                        'WebkitTransition' in s ||
                        'MozTransition' in s ||
                        'msTransition' in s ||
                        'OTransition' in s;
                s = null;
                return r;
            })(),

            // WebUploader实例
            uploader;

        if (!WebUploader.Uploader.support()) {
            toastr.error('Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
            throw new Error('WebUploader does not support the browser you are using.');
        }

        // 实例化
        uploader = WebUploader.create({
            auto: true,
            pick: {
                id: '#filePicker',
                label: '点击选择图片'
            },
            dnd: '#uploader .queueList',
            paste: document.body,

            accept: {
                title: 'Images',
                extensions: 'gif,jpg,jpeg,bmp,png',
                mimeTypes: 'image/*'
            },

            // swf文件路径
            swf: 'Uploader.swf',

            disableGlobalDnd: true,

            chunked: true,
            server: '/ext/attachment/homefile/uploadpic?type=atlas',
            fileNumLimit: 6,
            fileSizeLimit: 6 * 1024 * 1024,    // 200 M
            fileSingleSizeLimit: 1 * 1024 * 1024    // 50 M
        });
        
        // // 添加“添加文件”的按钮，
        // uploader.addButton({
        //     id: '#filePicker2',
        //     label: '继续添加'
        // });
        uploader.on('uploadSuccess', function (file, res) {
            var id = $("#"+pics_ids).val();
            console.log(id);
            file.serverSrc = res.src
            var ids;
            if(id){
                ids = JSON.parse(id);
                ids.push(res.src);
            }else{
                ids = [];
                ids.push(res.src);
            }

            $("#"+pics_ids).val(JSON.stringify(ids));
        });
        //编辑的时候载入图片
        if("{{val}}".length >0){
            {% for pval in val|strToArray%}
            var picobj = {}
            var picurl = "{{pval|get_pic('m=1,w=110,h=110')}}";
            picobj.src = picurl;
            picobj.id = {{pval}};
            picobj.name = {{pval}};
            addpic(picobj);
            {% endfor %}
        }
        function addpic(file){
            $placeHolder.addClass('element-invisible');
            $statusBar.show();
            $queue.parent().addClass('filled');
            var $li = $('<li id="' + file.id + '" class="up">' +
                '<p class="imgWrap"></p>' +
                '</li>'),

                $btns = $('<div class="file-panel">' +
                    '<span class="cancel">删除</span>' +
                    '</div>').appendTo($li),
                $prgress = $li.find('p.progress span'),
                $wrap = $li.find('p.imgWrap'),
                $info = $('<p class="error"></p>');
            $li.on('mouseenter', function () {
                $btns.stop().animate({ height: '1.5rem' ,'line-height': '1.5rem'});
            });

            $li.on('mouseleave', function () {
                $btns.stop().animate({ height: 0 });
            });
            $btns.on('click', 'span', function () {
                var index = $(this).index(),
                    deg;
                var id=$(this).parents("li.up").attr("id");
                switch (index) {
                    case 0:
                        removepics(id);
                        //removepics()
                        return;

                    case 1:
                        //file.rotation += 90;
                        break;

                    case 2:
                        // file.rotation -= 90;
                        break;
                }




            });
            var img = $('<img src="' + file.src + '">');
            $wrap.empty().append(img);
            $li.appendTo($queue);
        }
        // 当有文件添加进来时执行，负责view的创建
        function addFile(file) {
            var $li = $('<li id="' + file.id + '">' +
                '<p class="imgWrap"></p>' +
                '</li>'),

                $btns = $('<div class="file-panel">' +
                    '<span class="cancel">删除</span>' +
                    '</div>').appendTo($li),
                $prgress = $li.find('p.progress span'),
                $wrap = $li.find('p.imgWrap'),
                $info = $('<p class="error"></p>'),

                showError = function (code) {
                    switch (code) {
                        case 'exceed_size':
                            text = '文件大小超出';
                            break;

                        case 'interrupt':
                            text = '上传暂停';
                            break;

                        default:
                            text = '上传失败，请重试';
                            break;
                    }

                    $info.text(text).appendTo($li);
                };

            if (file.getStatus() === 'invalid') {
                showError(file.statusText);
            } else {
                // @todo lazyload
                $wrap.text('预览中');
                uploader.makeThumb(file, function (error, src) {
                    if (error) {
                        $wrap.text('不能预览');
                        return;
                    }

                    var img = $('<img src="' + src + '">');
                    $wrap.empty().append(img);
                }, thumbnailWidth, thumbnailHeight);

                percentages[file.id] = [file.size, 0];
                file.rotation = 0;
            }

            file.on('statuschange', function (cur, prev) {
                if (prev === 'progress') {
                    $prgress.hide().width(0);
                } else if (prev === 'queued') {
                    $li.off('mouseenter mouseleave');
                    //$btns.remove();
                }

                // 成功
                if (cur === 'error' || cur === 'invalid') {
                    console.log(file.statusText);
                    showError(file.statusText);
                    percentages[file.id][1] = 1;
                } else if (cur === 'interrupt') {
                    showError('interrupt');
                } else if (cur === 'queued') {
                    percentages[file.id][1] = 0;
                } else if (cur === 'progress') {
                    $info.remove();
                    $prgress.css('display', 'block');
                } else if (cur === 'complete') {
                    //$li.append('<span class="success"></span>');
                    $li.on('mouseenter', function () {
                        $btns.stop().animate({ height: '2rem' ,'line-height': '2rem'});
                    });

                    $li.on('mouseleave', function () {
                        $btns.stop().animate({ height: 0 });
                    });
                }

                $li.removeClass('state-' + prev).addClass('state-' + cur);
            });

            $li.on('mouseenter', function () {
                $btns.stop().animate({ height: '2rem' ,'line-height': '2rem'});
            });

            $li.on('mouseleave', function () {
                $btns.stop().animate({ height: 0 });
            });

            $btns.on('click', 'span', function () {
                var index = $(this).index(),
                    deg;

                switch (index) {
                    case 0:
                        uploader.removeFile(file);
                        return;

                    case 1:
                        file.rotation += 90;
                        break;

                    case 2:
                        file.rotation -= 90;
                        break;
                }

                if (supportTransition) {
                    deg = 'rotate(' + file.rotation + 'deg)';
                    $wrap.css({
                        '-webkit-transform': deg,
                        '-mos-transform': deg,
                        '-o-transform': deg,
                        'transform': deg
                    });
                } else {
                    $wrap.css('filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + (~~((file.rotation / 90) % 4 + 4) % 4) + ')');
                    // use jquery animate to rotation
                    // $({
                    //     rotation: rotation
                    // }).animate({
                    //     rotation: file.rotation
                    // }, {
                    //     easing: 'linear',
                    //     step: function( now ) {
                    //         now = now * Math.PI / 180;

                    //         var cos = Math.cos( now ),
                    //             sin = Math.sin( now );

                    //         $wrap.css( 'filter', "progid:DXImageTransform.Microsoft.Matrix(M11=" + cos + ",M12=" + (-sin) + ",M21=" + sin + ",M22=" + cos + ",SizingMethod='auto expand')");
                    //     }
                    // });
                }


            });

            $li.appendTo($queue);
        }

        // 负责view的销毁
        function removeFile(file) {
            var $li = $('#' + file.id);

            delete percentages[file.id];
            updateTotalProgress();
            $li.off().find('.file-panel').off().end().remove();
            var ids;
            ids = JSON.parse($("#"+pics_ids).val());
            ids = ids.filter(function(item){
                return item!=file.serverSrc
            })
            $("#"+pics_ids).val(JSON.stringify(ids));
        }
      function removepics(id) {
        // alert(1)
        var $li = $('#' + id);

        delete percentages[id];
        updateTotalProgress();
        $li.off().find('.file-panel').off().end().remove();
        if($("#"+pics_ids).val()){
          var ids = [];
          $.each($("#"+pics_ids).val().split(','),function (k,res) {
            if(id != res){
              ids.push(res);
            }

          })
          $("#"+pics_ids).val(ids.join(','));
        }
      }

        function updateTotalProgress() {
            var loaded = 0,
                total = 0,
                spans = $progress.children(),
                percent;

            $.each(percentages, function (k, v) {
                total += v[0];
                loaded += v[0] * v[1];
            });

            percent = total ? loaded / total : 0;

            spans.eq(0).text(Math.round(percent * 100) + '%');
            spans.eq(1).css('width', Math.round(percent * 100) + '%');
            updateStatus();
        }

        function updateStatus() {
            var text = '', stats;

            if (state === 'ready') {
                text = '选中' + fileCount + '张图片，共' +
                    WebUploader.formatSize(fileSize) + '。';
            } else if (state === 'confirm') {
                stats = uploader.getStats();
                if (stats.uploadFailNum) {
                    text = '已成功上传' + stats.successNum + '张照片至XX相册，' +
                        stats.uploadFailNum + '张照片上传失败，<a class="retry" href="#">重新上传</a>失败图片或<a class="ignore" href="#">忽略</a>'
                }

            } else {
                stats = uploader.getStats();
                text = '共' + fileCount + '张（' +
                    WebUploader.formatSize(fileSize) +
                    '），已上传' + stats.successNum + '张';

                if (stats.uploadFailNum) {
                    text += '，失败' + stats.uploadFailNum + '张';
                }
            }

            //$info.html(text);
            $('.webuploader-pick').text('点击选择图片('+fileCount+')')
        }

        function setState(val) {
            var file, stats;

            if (val === state) {
                return;
            }

            $upload.removeClass('state-' + state);
            $upload.addClass('state-' + val);
            state = val;

            switch (state) {
                case 'pedding':
                    $placeHolder.removeClass('element-invisible');
                    $queue.parent().removeClass('filled');
                    $queue.hide();
                    $statusBar.addClass('element-invisible');
                    uploader.refresh();
                    break;

                case 'ready':
                    $placeHolder.addClass('element-invisible');
                    $('#filePicker2').removeClass('element-invisible');
                    $queue.parent().addClass('filled');
                    $queue.show();
                    $statusBar.removeClass('element-invisible');
                    uploader.refresh();
                    break;

                case 'uploading':
                    $('#filePicker2').addClass('element-invisible');
                    $progress.show();
                    $upload.text('暂停上传');
                    break;

                case 'paused':
                    $progress.show();
                    $upload.text('继续上传');
                    break;

                case 'confirm':
                    $progress.hide();
                    $upload.text('开始上传').addClass('disabled');

                    stats = uploader.getStats();
                    if (stats.successNum && !stats.uploadFailNum) {
                        setState('finish');
                        return;
                    }
                    break;
                case 'finish':
                    stats = uploader.getStats();
                    if (stats.successNum) {
                        toastr.success('上传成功');
                    } else {
                        // 没有成功的图片，重设
                        state = 'done';
                        location.reload();
                    }
                    break;
            }

            updateStatus();
        }

        uploader.onUploadProgress = function (file, percentage) {
            var $li = $('#' + file.id),
                $percent = $li.find('.progress span');

            $percent.css('width', percentage * 100 + '%');
            percentages[file.id][1] = percentage;
            updateTotalProgress();
        };

        uploader.onFileQueued = function (file) {
            fileCount++;
            fileSize += file.size;

            if (fileCount === 1) {
                $placeHolder.addClass('element-invisible');
                $statusBar.show();
            }

            addFile(file);
            setState('ready');
            updateTotalProgress();
        };

        uploader.onFileDequeued = function (file) {
            fileCount--;
            fileSize -= file.size;

            if (!fileCount) {
                setState('pedding');
            }

            removeFile(file);
            updateTotalProgress();

        };

        uploader.on('all', function (type) {
            var stats;
            switch (type) {
                case 'uploadFinished':
                    setState('confirm');
                    break;

                case 'startUpload':
                    setState('uploading');
                    break;

                case 'stopUpload':
                    setState('paused');
                    break;

            }
        });

        uploader.onError = function (code) {

            var errorcodeMap = {
                F_EXCEED_SIZE:'图片大小超出限时，最大1MB！',
                F_DUPLICATE:'图片重复！',
                Q_EXCEED_NUM_LIMIT:'图片信息最多6张！',
                Q_EXCEED_SIZE_LIMIT:'图片大小超出限时，最大1MB！',
                Q_TYPE_DENIED:'图片类型被禁止！',
            }
            toastr.error(errorcodeMap[code]||code);
        };

        $upload.on('click', function () {
            if ($(this).hasClass('disabled')) {
                return false;
            }

            if (state === 'ready') {
                uploader.upload();
            } else if (state === 'paused') {
                uploader.upload();
            } else if (state === 'uploading') {
                uploader.stop();
            }
        });

        $info.on('click', '.retry', function () {
            uploader.retry();
        });

        $info.on('click', '.ignore', function () {
            //alert('todo');
        });

        $upload.addClass('state-' + state);
        updateTotalProgress();
    });
</script>